pidgin/pidgin

Cleanup deprecated libsoup usage

2021-03-17, Elliott Sales de Andrade
54b2a95ac176
Cleanup deprecated libsoup usage

* Use `soup_session_add_feature_by_type` instead of the option.
* Use strings instead of defines for libsoup properties.
The former are deprecated and removed from libsoup 3.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/574/
if ENABLE_DOC
subdir('reference')
endif
if ENABLE_GTK
pidgin_man = configure_file(
input : 'pidgin3.1.in',
output : 'pidgin3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif
if enable_consoleui
finch_man = configure_file(
input : 'finch3.1.in',
output : 'finch3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif